KR20040018002A - Fabricated arch tunnel and construction method thereof - Google Patents

Abstract

PURPOSE: A prefabricated arch tunnel using a unit member and a construction method thereof are provided to enable quick construction, reduce the cost, and improve the appearance by previously making a concrete structure as several divided structures and transferring the divided structures to a job site and then executing finishing work of connected portions. CONSTITUTION: A prefabricated arch tunnel using a unit member comprises a fixing block installed on a base concrete layer(100), to install unit right and left wall members(110,120) precisely and quickly; the unit right and left wall members forming base parts(110a,120a) secured on the fixing block, curved parts(110b,120b) integrally formed with the base part as about an L-shape, with a predetermined inward curvature, a longitudinal combining unit and an opposite joint unevenness-combining part for the fastening with a ceiling member(130) by a bolt and a nut, and a lateral combining unit for the combining with neighboring members installed on sides; the unit ceiling member forming a prefabricated longitudinal combining unit and an opposite joint unevenness-combining part corresponding to the combining unit disposed to each upper end portion of the unit right and left wall members, and forming a lateral combining unit for the prefabricated combining with other members adjacent to the side portions of a curved body extended to the curved surfaces of the unit right and left wall members; and lateral bolt/nut-combining parts for the right and left connection between a longitudinal bolt/nut-fastening part and neighboring unit right and left wall members or neighboring unit ceiling members. Foam urethane and non-shrink mortar are filled in bolt/nut fastening grooves. Waterpfoofing is executed to the outside of connecting portions of each member by a waterproof sheet and the inside is finished with an elastic sealing member.

Description

Fabricated arch tunnel and construction method using unit member

The present invention relates to a prefabricated arch tunnel using a unit member and a construction method thereof, and in particular, a concrete structure of a specific type for building an arch tunnel is manufactured in advance in a few divided structures in a factory and transported to a site before assembling a joint part. The present invention relates to a prefabricated arch tunnel and its construction method which can be quickly constructed by finishing, economical and beautiful in landscape.

In general, arch structure is a structural form that has been widely used in civil engineering structures and buildings for a long time, and is widely used in small bridges, castles, and other residential spaces.

Since the arch structure is easy to distribute stress against external earth pressure or through load, the concrete cross section can be made thinner than other cross-sectional shapes under the same stress condition. Therefore, in spite of being economical, especially in harmony with the surrounding landscape, and providing psychologically comfortable emotions, construction sites still rely on conventional construction methods using spherical (box-type) structures in the form of cast-in-place concrete.

According to the conventional construction method, since the construction site installs round bars and formwork, processes and assembles reinforcing bars, pours concrete, cures it, and dismantles the form, a large number of people are added to the construction site. Since it is divided into three stages such as floor, wall, and slab, it takes a long time, and it is difficult to prevent sedimentation cracking of the slab, and the concrete thickness becomes thick under the condition that structurally equal stress is applied. In addition to poor safety, careful quality control of concrete is required. In addition, sufficient support is required for the installation of the jibo, many skilled workers are required, and since the triangular wing wall is installed in the shaft portion (tunnel entrance), there is a problem of damaging the landscape.

In particular, cracks due to heat of hydration and sedimentation cracks during large section concrete casting are pointed out as a representative case of poor construction, and a lot of cost is added to repairing cracks. It often occurs, and the construction of the concrete can not be done until the completion of curing of the concrete, and the construction period is prolonged, causing inconveniences in traffic, such as restriction of traffic, and becoming a target of civil complaints.

The present invention has been made in view of the above-mentioned matters, the concrete structure of a specific form for the construction of the arch tunnel in advance in the factory to produce a few divided structures and transported to the site after assembling the joint construction to finish quickly It is an object of the present invention to provide a prefabricated arch tunnel and a construction method using a unit member capable of economical and beautiful landscape.

1 is a front perspective view of a prefabricated arch tunnel according to the present invention.

Figure 2 is a front sectional view of the prefabricated arch tunnel according to the present invention.

FIG. 3 is a view illustrating a connection seam between a unit left and a right wall member and a unit ceiling member and a waterproof finish in a prefabricated arch tunnel according to the present invention.

Figure 4 is a view showing the structure of the concave-convex coupling portion provided in the fitting portion between the unit left, right wall member and the unit ceiling member of the prefabricated arch tunnel according to the present invention.

5 is a view showing the structure of the bolt / nut fastening portion provided only in the longitudinal fastening portion between the unit left, right wall member and the unit ceiling member of the prefabricated arch tunnel according to the present invention.

6 is a side view of a prefabricated arch tunnel according to the present invention.

7 is a plan view showing a coupling means provided only in the transverse fastening portion between the unit arch tunnel in the prefabricated arch tunnel according to the present invention.

8 is a cross-sectional view showing a coupling means of FIG.

Figure 9 is a view showing a state in which the mounting bracket for the mounting of the unit left, right wall member on the foundation concrete layer according to the construction method of the prefabricated arch tunnel according to the present invention.

10 is a view showing a process of installing the left and right side wall member by the lifting means in accordance with the construction method of the prefabricated arch tunnel according to the present invention installed in a predetermined position on the fixed base installed in the foundation concrete layer.

FIG. 11 is a view showing a process of mounting a unit ceiling member on a unit left and right side wall member by a lifting means according to a construction method of a prefabricated arch tunnel according to the present invention. FIG.

12 is a view showing a state of assembling the unit left, right wall member and the unit ceiling member according to the construction method of the prefabricated arch tunnel according to the present invention.

13 is a view showing a reinforcing bar between the left and right side wall member and the bottom concrete layer according to the present invention.

14 is a view showing the filling compaction by the filling soil on both sides of the assembled arch tunnel according to the construction method of the prefabricated arch tunnel according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ... Foundation Concrete Floor 102 ... Floor Concrete Floor

104 ... asphalt layer 110 ... unit left wall member

120 ... unit right wall member 130 ... unit ceiling member

110a, 120a ... Bottom section 110b, 120b ... Curved section

110c ... longitudinal bolt / nut coupling 120c ...

120d ... bolt / nut tightening groove 120e ... elastic washer

120f ... Bolt nut fastener 140 ... Connection bracket

150 ... Bolt / Nut Fasteners 151 ... Horizontal Bolt / Nut Fasteners

160 ... rebar connector 170 ... bolt / nut tightening groove

200 ... Polyurethane 210 ... Elastic sealing material

220 ... fixture 221 ... anchor bolt

222 ... H section steel (or I section steel) 223 ... non-shrink mortar

225 ... Boot mortar 224 ... Anchor bolt insertion hole

230 ... lifting means 231 ... sloped ground

240 ... waterproof sheet

In order to achieve the above object, the prefabricated arch tunnel using the unit member according to the present invention is to be divided into pre-fabricated and transported to the site, and then to build an arch tunnel by assembly,

It is installed on the upper surface of the fixing stand installed at the left and right ends of the foundation concrete layer 100 of the tunnel construction site, and has an approximately L shape with respect to the bottom parts 110a and 120a that can be seated on the fixing stand and the bottom part thereof. Is formed in, but the curved portion (110b, 120b) having a predetermined curvature inward and the coupling means (110c, 151) for the prefabricated coupling with other neighboring members are provided at the upper end and the side end, respectively, the upper end Unit left and right wall members 110 and 120 having an engagement concave-convex coupling part 120c for coupling with the unit ceiling member 130; And

The upper and lower ends of both sides of the unit left and right wall members are respectively assembled on the upper ends of the unit, and the curved body may extend to the curved surfaces of the unit left and right wall members to form a single arch surface as a whole. At the lower end of the body, prefabricated coupling means and engagement coupling parts corresponding to the bolt / nut fastening means 110c and the engagement concave-convex coupling part 120c provided at each upper end of the unit left and right wall members 110 and 120 are provided. Each side is provided, and the side portion of the body is characterized in that it comprises a unit ceiling member 130 is provided with a coupling means 151 for prefabricated coupling with other neighboring members.

In addition, the construction method of the prefabricated arch tunnel according to the present invention in order to achieve the above object, is installed on the foundation concrete 100, the placing surface fixed to the unit left, right side wall members (110, 120) installed in the upper position For the fixing portion 220, and pre-divided and molded, the bottom portion (110a, 120a) that can be seated on the concrete floor and the bottom portion is formed integrally of approximately L-shaped, inwardly predetermined Units left and right having curvatures 110b and 120b, and coupling means 110c and 151 and engagement concave and convex coupling portions 120c for prefabricated coupling with neighboring other members, respectively, on upper and side ends thereof. It consists of a wall member (110, 120) and a curved body extending to the curved surface of the unit left, right wall member to form a single arch surface as a whole, the lower end of the body on each side of the unit left, right wall member At the top Unit prefabricated coupling means corresponding to the coupling means (110c) and the engagement concave-convex coupling portion (120c) is provided, respectively, the unit ceiling is provided with a coupling means (151) for the prefabricated coupling with the neighboring other members on the side of the body In constructing the prefabricated arch tunnel using the member 130,

(a) forming a foundation concrete layer 100 after compacting and arranging the ground of the site of the tunnel construction target;

(b) installing fixing rods 220 for mounting the left and right wall members 110 and 120 at both ends of the upper surface of the foundation concrete layer 100;

(c) mounting and installing the unit left and right wall members on the fixing base;

(d) installing the unit ceiling member 130 on the unit left and right wall members; And

(e) repeating assembling the unit arch tunnel structure consisting of the unit left and right wall members 110 and 120 and the unit ceiling member 130 in the same manner to extend and build in the longitudinal direction of the tunnel. There is this.

Furthermore, the method further includes forming a bottom concrete layer 102 on the foundation concrete layer 100 and paving the asphalt 104 thereon.

In addition, after completion of the extension in the longitudinal direction of the arch tunnel structure, and filling the soil in the left and right spaces of the tunnel structure further comprising the step of filling.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a prefabricated arch tunnel according to the present invention, Figure 1 is a front perspective view, Figure 2 is a front sectional view, Figure 3 is a connection seam and waterproof finish detail.

1 to 3, the prefabricated arch tunnel according to the present invention is to be divided into a pre-fabricated and transported to the site, and then to build a single arch tunnel by assembly, largely unit left, right wall member ( 110, 120 and the unit ceiling member 130.

The unit left and right wall members 110 and 120 are installed on the upper surfaces of the left and right ends of the foundation concrete layer 100 at the tunnel construction site, and bottom portions 110a and 120a that can be seated on a fixed base installed on the foundation concrete layer. ) And its bottom portions 110a and 120a are formed integrally in a substantially L-shape, and have curved portions 110b and 120b having a predetermined curvature inwardly. Coupling means for prefabricated coupling with other neighboring members are provided at the upper end and the side end of the curved portions 110b and 120b, respectively.

Here, as shown in Figures 4 and 5 as the coupling means provided in the upper end of the left and right wall members (110, 120) and the lower left and right sides of the unit ceiling member 130, the left and right wall members (110, 120) The cross-sectional shape of the fitting portion where the upper end portion and the lower end portion of the unit ceiling member 130 are bound is formed in a substantially “S” shape, and an uneven coupling portion 120c is provided to allow them to be firmly coupled thereto. In order to prevent movement or displacement between the unit ceiling member 130 and the left and right side wall members (110.120) is a longitudinal bolt nut consisting of a bolt nut fastening groove (120d), elastic washer (120e), bolt nut (120f) Fastening portion 110c is provided in the appropriate number at the right position on the left and right are closely coupled to each other.

In FIG. 4, reference numeral 200 denotes a foam urethane 200 filled in the space of the bolt / nut fastening groove 120d. This is described again later.

As described above, longitudinal coupling means are provided at the upper end of the left and right wall members 110 and 120 and the lower end of the ceiling member 130, and as shown in FIGS. 6 to 8, the left and right wall members 110 and 120. Lateral coupling means 151 is provided at the side end of the side and the side end of the ceiling member 130. That is, the coupling means of the side end portion is composed of a coupling tool 140, bolt / nut fastener 150 and bolt / nut fastening groove 170 of the "c" shape as a lateral connection coupling means between the unit arch tunnel. The connection bracket 140 is embedded in the concrete body of the left and right wall members 110 and 120 or the ceiling member 130 except for the fitting portion, and fastening work on both sides of the bolt / nut fastener 150. Bolt / nut fastening groove 170 is formed to facilitate the. In FIG. 8, reference numeral 223 denotes non-contraction mortar filling. This will be described later.

Then, the construction method of the prefabricated arch tunnel using the unit member according to the present invention having the above configuration will be described.

In the construction method of the prefabricated arch tunnel using the unit member according to the present invention, in the construction of the prefabricated arch tunnel using the unit left and right wall members 110 and 120 and the unit ceiling member 130 as described above, FIG. As in, first, after cleaning the ground of the site of the tunnel construction target is to form a foundation concrete layer (100). At this time, if necessary, after assembling and installing the tunnel, the bottom concrete layer 102 and the asphalt layer 104 may be further formed on the foundation concrete layer 100.

When the formation of the foundation concrete layer 100 is completed, as shown in Figure 9, on both ends of the upper surface of the foundation concrete layer 100, the fixing table for precise mounting of the left and right wall members (110, 120) ) Is installed. Here, the fixture 220 is anchor bolt 221 fastened to the anchor bolt insertion hole 224 inserted into the foundation concrete layer 100, and H is fixed to the horizontal installation of the anchor bolt 221 by welding It consists of section steel or section I steel. When the installation of the fixture 220 is completed, all parts of the lower portion except the upper end of the H-beam or I-beam is finished with a mortar 225.

At this time, the fixing table 220 is to be installed to accurately position and height (LEVEL) of the unit left, right wall member and to proceed with the installation, it is only necessary to fix the unit left, right wall member installed thereon.

When the holder is installed and the finishing treatment of the mortar 225 is completed, as shown in FIG. 10, the lifting unit 220 is lifted by the lifting means 230 such as a crane to lift the unit left and right wall members 110 and 120. ) Settle and install at each of the above positions. Thereafter, as shown in FIGS. 11 and 12, the unit ceiling member 130 is lifted and mounted on the unit left and right wall members 110 and 120. At this time, the ceiling member 130 is a left and right side wall due to the cross-sectional shape of the coupling means, that is, the longitudinal concave-convex coupling portion 120c provided at the upper end of the unit left and right wall members 110 and 120 and the lower end of the unit ceiling member 130, respectively. It is securely mounted on the upper end of the members (110, 120). When the mounting work is completed, the unit left and right wall members 110 and 120 and the unit ceiling member 130 are simply fastened by tightening the longitudinal bolt / nut fastening portion 110c which is embedded at an appropriate position within the uneven coupling portion 120C. I can assemble it. In particular, the space after the bolt / nut coupling of the bolt / nut fastening portion (110c) as shown in FIG.

When the construction of the unit arch tunnel structure consisting of the unit left and right wall members 110 and 120 and the unit ceiling member 130 is completed, the unit left and right wall members 110 and 120 and the unit ceiling member ( 130 is repeatedly assembled in the longitudinal direction of the tunnel to construct one completed arch tunnel structure. At this time, as shown in Figs. 6 to 8, the lateral connection joint between the unit arch tunnel, fastening the connecting bracket 140, which is embedded in the adjacent members with the bolt nut 150, bolt fastening groove After filling the 170 with the non-shrink mortar 223, each joint is waterproofed with a waterproof sheet 240, the inside is finished with an elastic sealing material 210 (see Fig. 8). In addition, the shaft portion (entrance) of the arch tunnel, as shown in FIG. 3, may form the unit ceiling member 130 only partially or according to the inclination angle of the upper inclined ground 231 or the shaft only as the left and right side wall members 110 and 120. The entrance and exit of the arch tunnel can be naturally finished according to the inclination angle of the inclined ground at the upper part of the tunnel, so that the landscape of the tunnel entrance can be naturally processed.

In this way, when the construction of the entire arch tunnel structure is completed, as shown in FIGS. 12 and 13, the reinforcing bar is connected to the reinforcing bar connector 160 embedded in the bottoms 110a and 120a of the left and right side wall members. After constructing the concrete layer 102, as shown in Figure 14 to fill the soil in the left and right spaces of the tunnel structure to fill the fill.

As described above, the prefabricated arch tunnel and the construction method according to the present invention after transporting and assembling each concrete structure divided into a few parts having an arch shape to the field filling and closing the bolt nut fastening groove and each joint By finishing the part with waterproof sheet, etc., one prefabricated arch tunnel is completed, so that the time required for the construction of the tunnel can be greatly reduced, and each of the concrete structures manufactured separately is subjected to thorough quality inspection in the factory at the manufacturing stage. Excellent reliability can be obtained in terms of the quality of the finished concrete structure.

Claims (6)

Fixture 220 is installed for precise and rapid installation of the unit left, right wall member (110, 120) on the base concrete layer (100); It is formed integrally in an approximately L shape with respect to the bottom portions 110a and 120a and its bottom portion which can be seated on the fixing rods installed on the upper left and right ends of the foundation concrete 100 surface of the tunnel construction site. Curved portions 110b and 120b having a predetermined curvature and upper end portions thereof are fitted with longitudinal coupling means 110c for fastening bolt nuts with neighboring ceiling members 130, and concave-convex coupling portions 120c have side ends. The unit has left and right side wall members 110 and 120 provided with lateral coupling means 151 for coupling with adjacent members installed on the side; The upper and lower ends of both sides of the unit left and right wall members are respectively assembled on the upper ends of the unit, and the curved body may extend to the curved surfaces of the unit left and right wall members to form a single arch surface as a whole. On both lower ends of the body, prefabricated longitudinal coupling means (110c) and the fitting concave-convex coupling portion (120c) corresponding to the coupling means provided on each upper end of the left and right wall members of the unit are provided, respectively, A side ceiling unit (130) having a transverse coupling means (151) for prefabricated coupling with other neighboring members; And The left and right wall members and the unit ceiling member are vertically connected to each other so that the longitudinal bolt nut fastening unit 110c for assembling the unit arch tunnel and the unit left and right wall members or adjacent unit ceiling members are connected to each other. The lateral bolt / nut fastening part 151 for each is installed, and after tightening the bolt nut, filling the foamed urethane 200 and the non-shrink mortar 223 filling the bolt / nut fastening groove (120d, 170) and each Prefabricated arch tunnel using a unit member characterized in that the outside of the connection portion generated by the member is waterproofed with a waterproof sheet 240 and the inside is finished with an elastic sealing material (210). The method of claim 1, The upper and lower end portions of the unit left and right wall members 110 and 120 are provided with a fitting concave-convex coupling part 120C having a cross-sectional shape of approximately “S” shape, and fastening bolt nuts between upper and lower members in the concave-convex coupling section. Longitudinal bolt nut fastening portion 110c consisting of a bolt nut fastening groove 120d, an elastic washer 120e, and a bolt nut 120f is installed in an appropriate amount at the proper position, and the sides of the unit left and right wall members 110 and 120 are provided. At the end, other parts of the body except for the fitting portion at the proper position for the lateral coupling between the unit arch tunnel, the "c" shaped connection bracket 140 and bolts are embedded in the concrete body of the left and right wall members (110, 120) Prefabricated arch using unit members, characterized in that the unit left, right wall member is provided with the lateral coupling means 151 between the unit arch tunnel made of bolt / nut fastener 150 located in the / nut fastening groove 170 tunnel. The method of claim 1, The lower end of the unit ceiling member 130 has a cross-sectional shape of approximately "S" shape so that the unit ceiling member 130 can be closely mounted corresponding to the concave-convex coupling portion provided on the upper end of the left and right side wall members (110, 120). Concave-convex coupling part is provided and the bolt nut fastening groove corresponding to the bolt nut fastening groove (120d) provided on the upper left and right side wall members (110, 120) for the upper and lower coupling with the left and right side wall members (110, 120) is installed in the proper position and the unit On the side end of the ceiling member 130, the other portion of the body except for the fitting portion for the lateral coupling with the adjacent ceiling member is a "c" shaped connection bracket embedded in the concrete body of the unit ceiling member 130 ( 140) and the prefabricated arch tunnel using a unit member, characterized in that the ceiling member is provided with a transverse coupling means consisting of bolt / nut fasteners 150 located in the bolt nut fastening groove (170). The method of claim 1 The anchor 220 is an anchor bolt for adjusting the installation height of the anchor bolt insertion hole 224 and the left and right side wall members 110 and 120 inserted into the foundation concrete layer 100 to adjust the installation position of the left and right side wall members 110 and 120. 221 and the lower portion except for the upper end of the H-beam or I-beam and H-beam or I-beam, which are fixed by welding on the upper part of the anchor bolt 221 to correspond to the load transmitted from the left and right side wall members, 225) prefabricated arch tunnel using a unit member, characterized in that the fixing stand. (A) forming a foundation concrete layer 100 after pruning the ground of the site of the tunnel construction target; (b) H-shaped steel or I-shaped steel as H-shaped steel or I-shaped steel fixedly installed by welding on the upper part of the anchor bolt 221 fastened to the anchor bolt insertion hole 224 inserted into both ends of the upper surface of the foundation concrete layer 100 The lower part of the lower part except for the upper part of the installation mortar 225, the fixing step 220 is installed; (C) the bottom portion 110a, 120a which can be seated on the concrete floor surface and the bottom portion is formed integrally of approximately L-shaped with respect to the bottom portion, the curved portion having a predetermined curvature inwardly ( Mounting and installing unit left and right wall members 110b and 120b at a proper position; (d) lifting and mounting the unit ceiling member 130 on the unit left and right wall members; (e) Bolts / nuts fastening portions provided at the designated positions with the uneven coupling portion 120c having an “s” shape at the upper end of the unit left and right wall members 110 and 120 and the lower end of the unit ceiling member 130. Using the / 110 (c) is connected to the bolt / nut using a coupling means (110c) consisting of an elastic washer 120e and the bolt / nut fastening portion / sphere (120f) located in the bolt / nut fastening groove (120d). Fastening the unit left and right side wall members and the unit ceiling member up and down, respectively, and filling the foamed urethane 200 into the bolt / nut fastening groove 120d; (f) The left and right wall members 110 and 120 and the “c” shaped connecting bracket 140 provided at the side ends of the unit ceiling member are other parts of the body except for the fitting portion of the left and right wall members ( The unit left and right wall members and the unit ceiling members are buried at a predetermined position in the concrete body of the 110 and 120 and adjacent to each other by using the bolt / nut fastening part / sphere 150 located in the bolt / nut fastening groove 170. Connecting and filling the bolt / nut fastening groove 170 with the non-shrink mortar 223; (g) repeating assembling the unit arch tunnel structure including the unit left and right wall members 110 and 120 and the unit ceiling member 130 in the same manner through each of the above steps to extend and build in the longitudinal direction of the tunnel; (h) After connecting the reinforcing bar to the reinforcing bar connector 160, which is embedded in the bottom portion (110a, 120a) of the left and right side wall members (110, 120), the bottom concrete 102 is poured to integrate the left and right wall members and concrete pavement Building a layer; (i) the outside of the connection portion generated by connecting each unit member in step (g) is waterproofed with a waterproof sheet 240 and the inside is finished with an elastic sealing material 210; And (j) after the construction of the bottom concrete 102 of the step (h) is completed, filling the soil in the left and right spaces of the tunnel structure and compacting the fillet further comprises the step of finishing the tunnel construction Construction method of prefabricated arch tunnel using. The method of claim 5, According to the inclination angle of the shaft (entrance) upper inclined ground 231 of the tunnel, the ceiling member 130 is only partially formed, or the shaft portion is constructed only by the left and right side wall members 110 and 120 without the ceiling member 130. A method of constructing a prefabricated arch tunnel using a unit member, characterized by providing a natural view to the entrance and exit of the tunnel.